US5226694A - Hydraulically controlled brake system and associated corrector - Google Patents

Hydraulically controlled brake system and associated corrector Download PDF

Info

Publication number
US5226694A
US5226694A US07/717,557 US71755791A US5226694A US 5226694 A US5226694 A US 5226694A US 71755791 A US71755791 A US 71755791A US 5226694 A US5226694 A US 5226694A
Authority
US
United States
Prior art keywords
corrector
brake system
cut
point
lock device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US07/717,557
Other languages
English (en)
Inventor
Patrice Moinard
Philippe Castel
Jean-Michel Pichon
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bendix Europe Services Techniques SA
Original Assignee
Bendix Europe Services Techniques SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bendix Europe Services Techniques SA filed Critical Bendix Europe Services Techniques SA
Assigned to BENDIX EURUOPE SERVICES TECHNIQUES reassignment BENDIX EURUOPE SERVICES TECHNIQUES ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: CASTEL, PHILIPPE, MOINARD, PATRICE, PICHON, JEAN-MICHEL
Application granted granted Critical
Publication of US5226694A publication Critical patent/US5226694A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/26—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force characterised by producing differential braking between front and rear wheels
    • B60T8/266—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force characterised by producing differential braking between front and rear wheels using valves or actuators with external control means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/26—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force characterised by producing differential braking between front and rear wheels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/88—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration with failure responsive means, i.e. means for detecting and indicating faulty operation of the speed responsive control means
    • B60T8/92—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration with failure responsive means, i.e. means for detecting and indicating faulty operation of the speed responsive control means automatically taking corrective action
    • B60T8/94—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration with failure responsive means, i.e. means for detecting and indicating faulty operation of the speed responsive control means automatically taking corrective action on a fluid pressure regulator

Definitions

  • the present invention relates to hydraulically controlled brake systems for motor vehicles, comprising a master cylinder, a corrector intended for reducing the pressure prevailing in the rear-wheel brakes in relation to that prevailing in the front-wheel brakes, and a wheel anti-lock device.
  • the document FR-A-2,624,462 proposes normally to short-circuit the corrector as soon as the vehicle so equipped is moving, a maximum pressure being applied to the rear-wheel brakes and being modulated by the anti-lock device, and to activate the corrector only in the event of a failure of the anti-lock device.
  • the object of the present invention is to overcome these disadvantages by using a corrector operating permanently in order to reduce the pressure in the rear-wheel brakes, the active pressure nevertheless being modified in the event of a failure of the anti-lock device, in order to ensure maximum safety without detriment to comfort.
  • the corrector is of the type with a controlled shift of the cut-off point, during the operation of the anti-lock device the cut-off point having a specific value higher than that of a corrector equipping a vehicle without a wheel anti-lock device, while it is substantially equal to the latter in the event of a failure of the anti-lock system.
  • the anti-lock device is thus used only a little as a corrector. The lifetime of the device is thereby protected and there is maximum braking safety.
  • the invention also relates to a corrector of the abovementioned type.
  • FIGS. 1 and 2 illustrate diagrammatically two embodiments of an electrically controlled corrector according to the invention
  • FIG. 3 shows diagrammatically an embodiment of a hydraulically controlled corrector according to the invention
  • FIG. 4 is a schematic illustration of a brake system with an anti-lock device.
  • the corrector consists of a body 1 in which a bore has been made.
  • a stepped piston 3 slides in this bore.
  • a plug 5 closing the bore has itself a bore in which the part of smaller diameter of the stepped piston 3 slides.
  • a spring 7 keeps the piston 3 and the plug 5 away from one another.
  • the inlet 9 formed by an orifice made in the plug 5 is connected to an outlet of the master cylinder (not shown).
  • the piston 3 has an inner channel 15 connecting its two faces. Arranged in this channel 15 is a ball 17 forming a shutter, returned by a spring 19 onto a seat 21 integral with the piston 3.
  • a needle 23 integral with a pusher 25 is capable of opening the shutter 17 by pushing on the latter.
  • the chamber 27 confronting the face of larger diameter of the piston 3 is connected to the corrector outlet 29 which is connected to at least one rear-wheel brake motor.
  • a solenoid 31 connected to an electrical current source is capable of moving a magnetic core 33 integral with the pusher 25.
  • FIG. 4 illustrates schematically a braking system 10 with a master cylinder 2, a corrector 4 as illustrated in FIG. 1, front wheel brakes 30, rear wheel brakes 40, and a typical anti-lock device designated generally by reference numeral 50 and comprising an electronic control unit 60 (ECU), modulator mechanism 70, a source of fluid under high pressure 80, and wheel speed sensors 90.
  • ECU electronice control unit 60
  • modulator mechanism 70 modulator mechanism 70
  • source of fluid under high pressure 80 a source of fluid under high pressure 80
  • wheel speed sensors 90 wheel speed sensors
  • the solenoid 31 of FIG. 1 is energized, thereby causing a movement, to the right in FIG. 1, of the assembly consisting of the core 33, of the pusher 25 and of the needle 23 which tends to push the shutter 17 further away from its seat.
  • the cut-off point of the corrector determined by the first closing of the shutter, can be adjusted by screwing the plug 5 which is therefore threaded and which interacts with a corresponding internal thread in the bore.
  • the effect of such a screwing or unscrewing is to change the prestress of the spring 7 opposing the closing of the shutter.
  • the cut-off point can also be adjusted as a function of the load supported by the rear wheels of the vehicle, by substituting for the plug shown a piston controlled by this load.
  • the solenoid 31 is de-energized, the effect of this being to return the assembly consisting of the core 33, the pusher 25 and the needle 23 towards the left in FIG. 1 as a result of the action of the shutter spring 19 or of an auxiliary spring (not shown).
  • the shutter 17 then approaches its seat 21, thereby reducing the stroke of the piston 3 necessary for closing the shutter and consequently the corresponding load of the spring 7, thereby returning the abovementioned cut-off point to a level below the preceding level.
  • FIG. 2 illustrates a double corrector, although the embodiment can also apply to a single corrector.
  • the two cut-off points are each defined, here, by the prestress applied to a respective spring 35, 37.
  • the two springs are arranged in series and are each enclosed in a respective variable-volume chamber 41, 43. Between these two chambers, a piston 45 serves as a support for the springs and ensures that one chamber is isolated from the other.
  • the spring 37 has a lower prestress than that of the spring 35.
  • a conduit 47 made in the body 1 connects the chamber 43, in which the spring 37 of lower load in place is enclosed, to a reservoir 39 of incompressible fluid by means of a solenoid valve which consists, here, of a solenoid 31 controlling a core 33 opening or closing a shutter 49.
  • the solenoid 31 is energized and the shutter 49 is closed, thus isolating the chamber 43 which then constitutes a hydraulic wall. Consequently, the prestress of the spring 35 defines the cut-off point of the corrector, that is to say a high cut-off point.
  • the cut-off point selected when there is no failure of the anti-lock device is in the neighborhood of that required when the vehicle is under full load.
  • the cut-off point selected is that which would have been selected if the vehicle were not equipped with such an anti-lock device and corresponds substantially to that required for the vehicle under no load. The change from one cut-off point to the other thus ensures perfect braking safety, whatever the state of the anti-lock device.
  • FIG. 3 illustrates a corrector of the same type, but controlled hydraulically, thus making it possible to avoid using an additional solenoid.
  • the same elements as those described previously bear the same references.
  • the stepped piston 3 is integral with the pusher 25.
  • This pusher 25 slides sealingly in a stepped part 51 of the bore made in the body 1. Applied to the end of this pusher 25 is the fluid under high pressure delivered by the source associated with the anti-lock device.
  • This source is generally a conventional pump feeding the brake motors with suitable fluid.
  • the corrector therefore continues to operate conventionally, but its cut-off point is changed as a function of the pressure of the fluid applied to the end of the pusher 25.
  • this pressure is a simple continuous function of the pressure prevailing in the corresponding working chamber of the master cylinder.

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Regulating Braking Force (AREA)
  • Hydraulic Control Valves For Brake Systems (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)
US07/717,557 1990-06-20 1991-06-19 Hydraulically controlled brake system and associated corrector Expired - Lifetime US5226694A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9007696A FR2663597A1 (fr) 1990-06-20 1990-06-20 Systeme de freinage a commande hydraulique et correcteur associe.
FR9007696 1990-06-20

Publications (1)

Publication Number Publication Date
US5226694A true US5226694A (en) 1993-07-13

Family

ID=9397807

Family Applications (1)

Application Number Title Priority Date Filing Date
US07/717,557 Expired - Lifetime US5226694A (en) 1990-06-20 1991-06-19 Hydraulically controlled brake system and associated corrector

Country Status (9)

Country Link
US (1) US5226694A (de)
EP (1) EP0462867B1 (de)
JP (1) JPH04232162A (de)
BR (1) BR9102677A (de)
CZ (1) CZ279519B6 (de)
DE (1) DE69101881T2 (de)
ES (1) ES2054461T3 (de)
FR (1) FR2663597A1 (de)
RU (1) RU2041089C1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1201523A3 (de) * 2000-10-24 2004-01-07 Deere & Company Kraft-Rückführungs- und Druck-Ausgleichs-Bremssystem

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4213198A1 (de) * 1992-04-22 1993-10-28 Teves Gmbh Alfred Blockiergeschützte hydraulische Bremsanlage mit Bremskraftregler und passender Bremskraftregler
DE4224007A1 (de) * 1992-07-21 1994-01-27 Teves Gmbh Alfred Blockiergeschützte hydraulische Bremsanlage mit Bremskraftregler
FR2701530B1 (fr) * 1993-02-12 1995-03-24 Alliedsignal Europ Services Valve à décalage de pression et by-pass électrique.
EP0633172A1 (de) * 1993-07-09 1995-01-11 Volkswagen Aktiengesellschaft Umschaltbarer trägheitsgesteuerter Bremsdruckregler für hydraulische Kraftfahrzeug-Bremsanlagen
KR100383958B1 (ko) * 2000-12-12 2003-05-14 현대자동차주식회사 프로포셔닝 밸브

Citations (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3862781A (en) * 1973-11-14 1975-01-28 Gen Motors Corp Brake control proportioning system
GB1390947A (en) * 1972-12-02 1975-04-16 Girling Ltd Anti-skid brakind system for vehicles
US4121872A (en) * 1976-08-25 1978-10-24 Itt Industries, Inc. Pressure control unit for vehicular hydraulic brake systems
DE3419311A1 (de) * 1984-05-24 1985-11-28 Alfred Teves Gmbh, 6000 Frankfurt Hydraulische bremsanlage
JPS6137565A (ja) * 1984-07-31 1986-02-22 Nissan Motor Co Ltd ブレ−キ液圧制御装置
FR2569382A1 (fr) * 1984-08-25 1986-02-28 Bosch Gmbh Robert Procede pour le fonctionnement d'une installation de freinage de vehicule a systeme antiblocage et installation de freinage pour sa mise en oeuvre
DE3440541A1 (de) * 1984-11-07 1986-05-15 Alfred Teves Gmbh, 6000 Frankfurt Elektronisch gesteuerter bremskraftverteiler
GB2188112A (en) * 1986-03-14 1987-09-23 Kugelfischer G Schaefer & Co An electromagnetically-operable pressure modulator
US4714296A (en) * 1984-11-20 1987-12-22 Nippondenso Co., Ltd. Hydraulic control valve
US4805967A (en) * 1985-09-26 1989-02-21 Nippon A B S, Ltd. Anti-skid control apparatus for a vehicle braking system
US4812777A (en) * 1986-07-12 1989-03-14 Toyota Jidosha Kabushiki Kaisha Manually/electrically operated brake system
JPH0195959A (ja) * 1987-10-08 1989-04-14 Nippon Soken Inc アンチスキッド装置
JPH0195960A (ja) * 1987-10-08 1989-04-14 Nippon Soken Inc ブレーキ装置
FR2624462A1 (fr) * 1987-12-12 1989-06-16 Teves Gmbh Alfred Systeme de freinage antiblocage pour vehicule automobile
EP0368359A1 (de) * 1988-11-10 1990-05-16 Nippondenso Co., Ltd. Bremsregelgerät in diagonal aufgeteilten Bremssystemen für Kraftfahrzeuge
WO1990011917A1 (en) * 1989-04-13 1990-10-18 Lucas Industries Public Limited Company Improvements in fluid pressure-operated braking systems for vehicles
US4982999A (en) * 1989-09-29 1991-01-08 Allied-Signal Inc. Adaptive braking system default activated proportioning valve
GB2238361A (en) * 1989-10-31 1991-05-29 Bosch Gmbh Robert A motor vehicle braking system
US5118164A (en) * 1989-09-29 1992-06-02 Allied-Signal Inc. Adaptive braking system default activated proportioning valve

Patent Citations (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1390947A (en) * 1972-12-02 1975-04-16 Girling Ltd Anti-skid brakind system for vehicles
US3941427A (en) * 1972-12-02 1976-03-02 Girling Limited Anti-skid braking system for vehicles
US3862781A (en) * 1973-11-14 1975-01-28 Gen Motors Corp Brake control proportioning system
US4121872A (en) * 1976-08-25 1978-10-24 Itt Industries, Inc. Pressure control unit for vehicular hydraulic brake systems
US4647114A (en) * 1984-05-24 1987-03-03 Alfred Teves Gmbh Hydraulic brake system
FR2571326A1 (fr) * 1984-05-24 1986-04-11 Teves Gmbh Alfred Systeme hydraulique de freinage pour vehicules automobiles
DE3419311A1 (de) * 1984-05-24 1985-11-28 Alfred Teves Gmbh, 6000 Frankfurt Hydraulische bremsanlage
JPS6137565A (ja) * 1984-07-31 1986-02-22 Nissan Motor Co Ltd ブレ−キ液圧制御装置
FR2569382A1 (fr) * 1984-08-25 1986-02-28 Bosch Gmbh Robert Procede pour le fonctionnement d'une installation de freinage de vehicule a systeme antiblocage et installation de freinage pour sa mise en oeuvre
US4840434A (en) * 1984-08-25 1989-06-20 Robert Bosch Gmbh Vehicle brake system having an anti-skid apparatus
US4890890A (en) * 1984-08-25 1990-01-02 Robert Bosch Gmbh Vehicle brake system having an anti-skid apparatus
DE3440541A1 (de) * 1984-11-07 1986-05-15 Alfred Teves Gmbh, 6000 Frankfurt Elektronisch gesteuerter bremskraftverteiler
US4714296A (en) * 1984-11-20 1987-12-22 Nippondenso Co., Ltd. Hydraulic control valve
US4805967A (en) * 1985-09-26 1989-02-21 Nippon A B S, Ltd. Anti-skid control apparatus for a vehicle braking system
GB2188112A (en) * 1986-03-14 1987-09-23 Kugelfischer G Schaefer & Co An electromagnetically-operable pressure modulator
US4812777A (en) * 1986-07-12 1989-03-14 Toyota Jidosha Kabushiki Kaisha Manually/electrically operated brake system
JPH0195959A (ja) * 1987-10-08 1989-04-14 Nippon Soken Inc アンチスキッド装置
JPH0195960A (ja) * 1987-10-08 1989-04-14 Nippon Soken Inc ブレーキ装置
US4943123A (en) * 1987-10-08 1990-07-24 Nippondenso Co., Ltd. Brake control apparatus in diagonal braking hydraulic pressure supply system for use in motor vehicles
FR2624462A1 (fr) * 1987-12-12 1989-06-16 Teves Gmbh Alfred Systeme de freinage antiblocage pour vehicule automobile
GB2213543A (en) * 1987-12-12 1989-08-16 Teves Gmbh Alfred Anti-lock brake system for automotive vehicles
EP0368359A1 (de) * 1988-11-10 1990-05-16 Nippondenso Co., Ltd. Bremsregelgerät in diagonal aufgeteilten Bremssystemen für Kraftfahrzeuge
WO1990011917A1 (en) * 1989-04-13 1990-10-18 Lucas Industries Public Limited Company Improvements in fluid pressure-operated braking systems for vehicles
US4982999A (en) * 1989-09-29 1991-01-08 Allied-Signal Inc. Adaptive braking system default activated proportioning valve
US5118164A (en) * 1989-09-29 1992-06-02 Allied-Signal Inc. Adaptive braking system default activated proportioning valve
GB2238361A (en) * 1989-10-31 1991-05-29 Bosch Gmbh Robert A motor vehicle braking system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1201523A3 (de) * 2000-10-24 2004-01-07 Deere & Company Kraft-Rückführungs- und Druck-Ausgleichs-Bremssystem

Also Published As

Publication number Publication date
JPH04232162A (ja) 1992-08-20
CZ279519B6 (cs) 1995-05-17
FR2663597A1 (fr) 1991-12-27
RU2041089C1 (ru) 1995-08-09
EP0462867A1 (de) 1991-12-27
EP0462867B1 (de) 1994-05-04
BR9102677A (pt) 1992-02-04
DE69101881T2 (de) 1994-08-11
DE69101881D1 (de) 1994-06-09
CZ187991A3 (en) 1994-05-18
ES2054461T3 (es) 1994-08-01

Similar Documents

Publication Publication Date Title
US4634190A (en) Hydraulic brake system with slip control
US4647114A (en) Hydraulic brake system
US4489989A (en) Auxiliary power assisted master cylinder arrangement for a vehicle brake system
JPS62175247A (ja) アンチロツク液圧ブレ−キシステム
US5167441A (en) Anti-lock brake system for automotive vehicles
US4482190A (en) Multiple-circuit hydraulic brake system
JPH01257652A (ja) 自動車のためのアンチロック方式
GB2050540A (en) Anti-skid Braking Systems
US5655820A (en) System for regulating pressure with hybrid structure for a motor vehicle hydraulic braking circuit
GB2207721A (en) Anti-lock system and propulsion control system for a road vehicle
US5226694A (en) Hydraulically controlled brake system and associated corrector
US3972192A (en) Tandem master cylinder
US6641230B2 (en) Anti-locking brake system for a land vehicle
JPH02256553A (ja) アンチロック型ブレーキ装置
JPH04300765A (ja) ２回路ブレーキ装置
US4950027A (en) Brake pressure regulator
EP0470858B1 (de) Hydraulisches Bremsdruckregelsystem für Fahrzeuge
US5332304A (en) ABS hydraulic circuit with a variably open inlet valve
US4058346A (en) Master brake cylinder for motor vehicles
JPH0629007B2 (ja) 車両のアンチロツクシステム
US5383720A (en) Braking system for motor vehicles
JPS60229851A (ja) スキツド防止装置を有する車両ブレーキ装置
US5487597A (en) Hydraulic circuit with a capacity forming a distributor
US3883185A (en) Anti-skid control apparatus
US3801160A (en) Hydraulic pressure modulator

Legal Events

Date Code Title Description
AS Assignment

Owner name: BENDIX EURUOPE SERVICES TECHNIQUES

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:MOINARD, PATRICE;CASTEL, PHILIPPE;PICHON, JEAN-MICHEL;REEL/FRAME:005744/0633

Effective date: 19910605

STCF Information on status: patent grant

Free format text: PATENTED CASE

FEPP Fee payment procedure

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

FPAY Fee payment

Year of fee payment: 4

REMI Maintenance fee reminder mailed
FP Lapsed due to failure to pay maintenance fee

Effective date: 19970716

FPAY Fee payment

Year of fee payment: 8

FPAY Fee payment

Year of fee payment: 12